Might be overthinking it. There were 3 on the shelf at Majura Park TRU Canberra. I bought one for $135 then got the $10discount for joining up TRU LEGO group or something - I got them to run the Creator house through first at 20% off. So, overall, I was happy with that. David Jones Canberra Center have 60% off the second set you buy, but everything is at normal price. So, for instance, there's the Horizon train for $159 + 2nd one for $95 (or $127 each). I managed to get a Horizon Express of ebay for $100 (new) plus postage.